Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Knoxville to Portugal from $461

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Knoxville to Portugal departing on 5/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Knoxville to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:54 pm - 6:25 pm
TYS
-
LIS
18h 31m
2 stops
Multiple Airlines Logo
6:35 am - 8:18 pm
LIS
-
TYS
18h 43m
2 stops
$677Multiple Airlines
Sat, Apr 25 - Mon, May 4
Finnair Logo
1:20 pm - 11:25 pm
TYS
-
LIS
29h 05m
2 stops
Finnair Logo
6:35 am - 11:56 pm
LIS
-
TYS
22h 21m
2 stops
$686Finnair
Wed, Apr 22 - Fri, May 8
British Airways Logo
2:49 pm - 11:15 pm
TYS
-
LIS
27h 26m
2 stops
British Airways Logo
11:05 am - 9:57 pm
LIS
-
TYS
15h 52m
1 stop
$703British Airways
Wed, Apr 22 - Fri, May 8
British Airways Logo
7:00 am - 9:05 am
TYS
-
LIS
21h 05m
1 stop
British Airways Logo
11:05 am - 9:57 pm
LIS
-
TYS
15h 52m
1 stop
$710British Airways
Wed, Apr 22 - Fri, May 8
British Airways Logo
7:00 am - 9:05 am
TYS
-
LIS
21h 05m
1 stop
British Airways Logo
11:05 am - 9:57 pm
LIS
-
TYS
15h 52m
1 stop
$711British Airways
Sat, Apr 25 - Mon, May 4
Iberia Logo
11:31 am - 11:50 am
TYS
-
LIS
19h 19m
2 stops
Iberia Logo
8:25 am - 8:18 pm
LIS
-
TYS
16h 53m
2 stops
$727Iberia
Sat, Apr 25 - Mon, May 4
Multiple Airlines Logo
2:49 pm - 11:15 pm
TYS
-
LIS
27h 26m
2 stops
Multiple Airlines Logo
6:35 am - 9:21 pm
LIS
-
TYS
19h 46m
2 stops
$746Multiple Airlines
Wed, Apr 22 - Wed, May 13
Multiple Airlines Logo
7:00 am - 9:05 am
TYS
-
LIS
21h 05m
1 stop
Multiple Airlines Logo
8:55 am - 9:57 pm
LIS
-
TYS
18h 02m
2 stops
$754Multiple Airlines
Wed, Apr 22 - Wed, May 13
British Airways Logo
7:00 am - 9:05 am
TYS
-
LIS
21h 05m
1 stop
British Airways Logo
11:05 am - 9:57 pm
LIS
-
TYS
15h 52m
1 stop
$755British Airways
Wed, Apr 22 - Wed, May 13
American Airlines Logo
2:49 pm - 9:05 am
TYS
-
LIS
13h 16m
1 stop
American Airlines Logo
8:25 am - 8:18 pm
LIS
-
TYS
16h 53m
2 stops
$770American Airlines
Sat, Apr 25 - Mon, May 4

British Airways flights from Knoxville to Portugal

Our best British Airways deals on Knoxville to Portugal flight tickets
British Airways
Apr 22
TYS2:49 pmKnoxville McGhee Tyson
27h 26m
2 stops
LIS11:15 pmLisbon Humberto Delgado
May 8
LIS11:05 amLisbon Humberto Delgado
15h 52m
1 stop
TYS9:57 pmKnoxville McGhee Tyson
$703
British Airways
Apr 22
TYS7:00 amKnoxville McGhee Tyson
21h 05m
1 stop
LIS9:05 amLisbon Humberto Delgado
May 8
LIS11:05 amLisbon Humberto Delgado
15h 52m
1 stop
TYS9:57 pmKnoxville McGhee Tyson
$710
British Airways
Apr 25
TYS7:00 amKnoxville McGhee Tyson
21h 05m
1 stop
LIS9:05 amLisbon Humberto Delgado
May 4
LIS11:05 amLisbon Humberto Delgado
15h 52m
1 stop
TYS9:57 pmKnoxville McGhee Tyson
$711

Delta flights from Knoxville to Portugal

Our best Delta deals on Knoxville to Portugal flight tickets
Delta
Apr 5
TYS5:10 pmKnoxville McGhee Tyson
16h 25m
2 stops
LIS2:35 pmLisbon Humberto Delgado
Apr 18
LIS5:35 amLisbon Humberto Delgado
22h 24m
2 stops
TYS10:59 pmKnoxville McGhee Tyson
$799
Delta
Apr 5
TYS5:10 pmKnoxville McGhee Tyson
16h 25m
2 stops
LIS2:35 pmLisbon Humberto Delgado
Apr 18
LIS5:35 amLisbon Humberto Delgado
22h 24m
2 stops
TYS10:59 pmKnoxville McGhee Tyson
$850
Delta
May 13
TYS5:59 pmKnoxville McGhee Tyson
19h 46m
2 stops
LIS6:45 pmLisbon Humberto Delgado
Jun 23
LIS5:35 amLisbon Humberto Delgado
21h 24m
2 stops
TYS9:59 pmKnoxville McGhee Tyson
$1,052

momondo Fare Finder

 
Customize your flight search to find flights from Knoxville to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated March 26, 2026.
Use the filters below to find and compare flights from Knoxville to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 4/25

6:54 pm-6:25 pm

2 stops18h 31m

Lisbon Humberto Delgado

Mon 5/4

6:35 am-8:18 pm

2 stops18h 43m

$677

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

1:20 pm-11:25 pm

2 stops29h 05m

Lisbon Humberto Delgado

Fri 5/8

6:35 am-11:56 pm

2 stops22h 21m

$686

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

2:49 pm-11:15 pm

2 stops27h 26m

Lisbon Humberto Delgado

Fri 5/8

11:05 am-9:57 pm

1 stop15h 52m

$703

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Fri 5/8

11:05 am-9:57 pm

1 stop15h 52m

$710

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 4/25

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Mon 5/4

11:05 am-9:57 pm

1 stop15h 52m

$711

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 4/25

11:31 am-11:50 am

2 stops19h 19m

Lisbon Humberto Delgado

Mon 5/4

8:25 am-8:18 pm

2 stops16h 53m

$727

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

2:49 pm-11:15 pm

2 stops27h 26m

Lisbon Humberto Delgado

Wed 5/13

6:35 am-9:21 pm

2 stops19h 46m

$746

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Wed 5/13

8:55 am-9:57 pm

2 stops18h 02m

$754

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Wed 4/22

7:00 am-9:05 am

1 stop21h 05m

Lisbon Humberto Delgado

Wed 5/13

11:05 am-9:57 pm

1 stop15h 52m

$755
Quickest round-trip

KnoxvilleLisbon

TYS - LIS

TYSLIS

Knoxville McGhee Tyson

Sat 4/25

2:49 pm-9:05 am

1 stop13h 16m

Lisbon Humberto Delgado

Mon 5/4

8:25 am-8:18 pm

2 stops16h 53m

$770

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
1
2

See travel insights to Portugal from

How to get the cheapest flight ticket from Knoxville to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Knoxville is in February. Flight prices, which tend to average around $480, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Portugal from Knoxville during January instead. Flights to Portugal in January, while not as cheap as those in February, still average around $502.

Can stopping save me money on Knoxville to Portugal flights?

You could potentially save up to 34% on your flight if you consider stops on a Knoxville to Portugal flight.

Cheap Knoxville to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Knoxville to Portugal

Fastest flight time

18h 02m

Direct flights

None
The fastest flight from Knoxville to Portugal takes 18h 02m
There are no direct flights from Knoxville to Portugal. There are no popular flight routes from Knoxville to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Knoxville McGhee Tyson Airport to Portugal?

    Prices for flights from Knoxville McGhee Tyson Airport to Portugal were last updated today.

  • How many operators does momondo search for flights from Knoxville McGhee Tyson Airport to Portugal?

  • How old do you have to be to fly from Knoxville McGhee Tyson Airport to Portugal?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Knoxville McGhee Tyson Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The travel and health documents required for your trip to Portugal can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Knoxville to Portugal

Compare and see reviews for airlines that fly from Knoxville to Portugal with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom $475Free CancellationRating
6.7
7,820 reviews
Search British Airways flights
United AirlinesPriceFrom $633Free CancellationRating
7.4
9,488 reviews
Search United Airlines flights
American AirlinesPriceFrom $654Free CancellationRating
7.1
11,496 reviews
Search American Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Knoxville to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Knoxville to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Knoxville to Portugal with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Knoxville to Portugal flights to just show those with flexible booking policies.

How can momondo help me find flights from Knoxville to Portugal?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Portugal from Knoxville.

I’m not ready to book a flight from Knoxville to Portugal right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Knoxville to Portugal flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

An easier way to manage your Portugal trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sat 4/25
Sat 5/2
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Portugal

Popular cities in Portugal

Popular flights according to clicks in the last 7 days on momondo
Flights to Lisbonfrom $524
Flights to Portofrom $493
Flights to Funchalfrom $567
Flights to Farofrom $497
Flights to Ponta Delgadafrom $529
Flights to Lajesfrom $569
Flights to Pico Islandfrom $579
Flights to Hortafrom $596
Flights to Porto Santofrom $675
Flights to Velasfrom $595